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Your son plays with…girls. February 20, 2012

Posted by mareserinitatis in education, feminism, gifted, older son, societal commentary, younger son.
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We had parent teacher conferences recently.  While they overall went fairly well, there was one part of the discussion that bothered me.  The teacher seemed concerned that the younger son spent more time playing with girls than boys.

I think that what gets me about this is that I’ve heard it almost every year that either one of my kids has been in school.  Every time I hear it, I have the same reaction: “So?”

I can’t remember where I came across this bit of info, because I first found it when the older boy was in elementary school.  It turns out that kids that are gifted are more likely to be androgynous and make an effort to actively choose their interests rather than following prescribed “gender-appropriate” behaviors.

This was a huge relief for me for many reasons.  First, my sons have had interests in things like barrettes and finger nail polish, Dora, My Little Pony, etc.  I assumed it was normal curiosity that most kids had, but maybe not.  However, I’ve made an effort not to impose gender stereotypes on them unnecessarily.  I’ve also noticed that there’s a lot more rough and tumble and even some bullying that goes on with boys.  My boys aren’t into that, so it seems obvious that they would be more interested in playing with girls.

Second, it was a personal relief.  I work in a couple of fields that are mostly male, and when I feel comfortable with it, I can be rather confrontational and direct.  I was more interested in Legos than Barbies, and in school, I liked math and physics.  It’s nice to know that I’m not “weird” for a woman…even though I am apparently different.

If I ever needed proof that there are some aspects of gender that are socially prescribed, I’ve gotten it over and over in this one question.  I’m sure my parents got the opposite – your daughters are tomboys.  What surprises me about this is that people really get so worked up about it.  Why aren’t they surprised when girls and boys don’t want to play together?

My many hats February 9, 2012

Posted by mareserinitatis in computers, engineering, gifted, homeschooling, math, teaching, work, younger son.
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A couple weeks ago, my blog was promoted by a couple of sites and the hits started flowing in.  I commented to someone (most likely Gears) how it’s nice to be recognized for my blogging about engineering but frustrating for the lack of recognition for my actual engineering work.  Guess I should’ve waited a couple weeks.

Normal work has also been crazy. I’ve been given full control of the Minion and have thrown him in on a new project where he’s learning everything from scratch.  It’s similar to projects that I’ve done, but even more complicated and using a different program.  So our next couple weeks are going to be real fun as we’re going to be trying to make our way through using this new program and occasionally resorting to the old program for reality checks.

The other serious challenge I’ve been dealing with this week is long division.  It’s pretty scary stuff, especially when you have a seven-year-old who is fighting some rather strong perfectionistic tendencies.  He’s been getting to the long division portions in his computer math, and he starts to shut down.  I’ve been getting more and more frustrated with it, so I decided to put an end to it tonight.  I went back and printed out some of the older homeworks so that we could take a couple steps back.  I think the problem is that he really thinks he can do everything in his head.  I have to admit that his ability to do mental math far outweighs mine: I simply have to write everything down.  However, he’s starting to hit the limit of this particular ability, and so he freaks out whenever he has to do a problem where he can’t do it all in his head.

I told him that tonight’s homework was going to be doing some work sheets.  With the problems written out on paper, he didn’t seem to have this idea that he had to do everything in his head.  The first couple were challenges, but then he started getting the hang of things and was able to execute the last few problems very quickly.  By the time we had finished, he was doing 3-digit numbers divided by 2-digit numbers with no problem.  We’re going to do some more difficult problems tomorrow and then try heading back to the computer.

We tried a similar approach when he started to get stuck on multiplication a couple months ago.  I guess there are some things that really have to be written out to be understood.  I just hope he starts to make regular use of his notebook from here on out.

Wordless Wednesday: Hoarfrost makes North Dakota winters beautiful February 8, 2012

Posted by mareserinitatis in Fargo, photography, younger son.
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How I can tell the younger son is my child… January 28, 2012

Posted by mareserinitatis in math, younger son.
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The younger son is learning how to manipulate negative numbers in math.  However, he was getting very irritated when listening to the ‘lectures’ yesterday.  The lecture would use the term ‘minus’, as in -6 is pronounced ‘minus six’.  Every time it did that, the younger boy would make some exasperated grunt and say, loudly, “Negative!”

I can only think this may be because I always call them ‘negative’.  The term minus, to me, implies an operation. If so, he obviously picks up on subtleties a lot better than I thought.

When you think of a scientist… January 26, 2012

Posted by mareserinitatis in science, societal commentary, younger son.
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On the way to school yesterday, the younger boy started telling me that Dr. Frankenstein wasn’t a real scientist.  I asked him what he thought of when he heard the word scientist.  He was very quiet, and I started feeling anxious that this was going to end up in a “dude in a lab coat with beaker”.

I interjected, “You think of your mom, right?”

“No,” he paused for a few moments more.  ”I think of someone who is already dead.”

Oh great.  So to be a scientist, you can only be recognized post-mortem, right?  I wondered if it was someone crazy like Tesla.

“Already dead?”

“Yeah, she discovered radium, I think.”

I was kind of stunned.  He wasn’t thinking of guys in lab coats – he was thinking of Marie Curie.  Upon conversing further, it turned out that he knew quite a bit about her.  There was a Magic School Bus book on science fairs at his classroom, and he had read about her in there.

I had to admit that I was hugely relieved that not only did he suffer from a common misconception about what a scientist is but that his first thought of a scientist was actually a very accomplished female scientist.

Although I’m still a tiny bit sad he didn’t think of me.

Pinewood derby: What a drag! January 16, 2012

Posted by mareserinitatis in engineering, physics, science, younger son.
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My husband son competed yesterday in my son’s his scouting group’s pinewood derby race.  For those of you who have never had a kid in cub/boy scouts, they hand out these blocks of wood that you get to make into a car.  The idea isn’t to win the race: it’s supposed to be that dads and their boys spend some time bonding over manly things like woodworking.

(One year, Mike was out of town during this whole thing, so I got to be manly and help the older boy build his car.  All I can say is that Dremel tools are awesome.)

If you look on the web, you’ll find a lot of advice on how to prep pinewood derby cars and make them faster.  One thing that consistently bugs me is that one should pay attention to aerodynamics of the car and give it a low profile.

This makes me nuts.

To understand the following, you might want to know what a track looks like.  So here you go:

Let’s start out with the specifications.  Most pinewood derby tracks have a height of about 4 feet and a length of 32 feet.  I also will note that the ones we’ve raced on were wood, not aluminum.

Most of the pinewood derby cars I watched made it the whole 32 feet, though not all did.  So let’s say that, on average, they travel 32 feet.  The *fastest* ones traveled at an average speed of 10 ft/s (or 3 m/s).  The maximum they can weight 5 oz. or 140 g.

What we’re going to do here is look at how much energy the system puts into overcoming air resistance versus friction.  It’s very hard to figure out exactly how much goes into friction simply using equations, so we’re going to figure out the total energy and the energy lost to drag forces.  Once we have those two quantities, we can subtract the drag forces from the total energy and assume that the difference is equal to the frictional losses.  Finally, we can compare the drag and frictional losses.

First things first: what is our total energy?  It starts out entirely as potential energy as the cars are placed at rest on the top of the ramp.  Potential energy is, fortunately, very easy to calculate.  It is simply the product of the height of the object, its mass, and the gravitational acceleration.  In other words,

We know the mass of the car (0.14 kg), the height is approximately 1.22 m, and the graviational acceleration is 9.8 m/s2.  This results in a total potential energy of approximately 1.67 J.

The potential energy is equal to the total energy in the system since the cars start with no other kind of energy.  In a frictionless and drag-free system, all of this energy would be converted to kinetic energy and the cars would drive forever at the same speed once they reached the bottom of the ramp.  Obviously, however, that’s not what happens.  Eventually, all of the energy is converted to friction and drag, and the cars stop.

Now we need to determine the drag on the cars.  The drag equation is:

The drag force is proportional, therefore, to the density of the fluid (ρ), velocity (v), drag coefficient (CD), and cross-sectional area (A).

The density of the fluid (air) is approximately 1.2754 kg/m3, and the velocity is 3 m/s.  The cross-sectional area of the car, at maximum, is 2.75 x 3 in.  In real *ahem* units, this is 0.00532257 m2.

The drag coefficient for a long cylinder, according to Wikipedia, is 0.82.  Given the cars are all sorts of different shapes, I think this would probably be the closest approximation, although for some cars, this will be high.

All of this put together gives us a force of 0.025 N.  Over a distance of 32 feet (or 9.75 m), this gives an energy of 0.24 J.

If we assume that all of the potential energy is converted to either drag or friction, that means 0.24 J is converted to drag while 1.43 J goes into friction.  This means that roughly 14% of your energy losses are due to drag while the other 86% are due to friction.

My advice, therefore, is to not worry so much about drag and the aerodynamics of the car and to worry far more about the ways to reduce friction.

What should you do to help your pinewood derby car to be fast?  There are three things:

1) You want to maximize your potential energy, so being as close to the 140 gram maximum weight is good.  You can get all sorts of weights commercially to assist with this.  Some people have argued that putting the weights near the back of the vehicle helps even more.  I wouldn’t doubt this as you’re putting the weight at greater height, giving the car more initial energy to start with.

2) The biggest issue is reducing the friction between the wheel and the axle, and there are a few easy ways to do that: sanding and polishing the axles as well as using graphite or teflon as a lubricant.  (Our troupe doesn’t allow graphite because it marks the floors, but teflon is allowed.)

3) Reduce the friction between the car and track.  The best way to do this is to make sure your wheel alignment is as straight as possible as this will keep it from rubbing against the center of the track.

The winner of our pinewood derby actually had a very blocky car designed to look like a platypus.  I’m guessing the winner didn’t spend much time focusing on aerodynamics and instead chose to minimize their frictional losses.

The pink plate January 10, 2012

Posted by mareserinitatis in feminism, gifted, older son, younger son.
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Yesterday, I reposted a link to the article about the teenage boy who stuck up for his younger brother.  The younger brother apparently wanted a video game with a girl character and a purple game controller.  When his dad saw what he had, he flipped out, and the teenager told his dad off.

While I don’t think his dad reacted at all appropriately, I also know that this is a very difficult thing to deal with as a parent.  I know that gifted kids tend to be more androgynous, and as luck would have it, I have two emotionally sensitive boys.  The older boy never really seemed to be into ‘girl things’ as a kid, but it was easy to tell that he operated a lot more on feeling than logic.  Society expects males to be stoic, even at a young age.  There’s been research on how this negatively impacts boys in school because of interactions with teachers who expect otherwise.

My younger son has always seemed somewhat interested in ‘girly’ things, starting at about 3 or 4 when he was in love with anything having to do with Dora the Explorer.  He wanted to paint his room pink and decorate it with Dora and Boots.  I never did it…but that was more because I didn’t have time.  But when he asked me to get a Dora the Explorer backpack, I declined.  However, I have painted his toenails.

I have had concerns in the past because at his previous school, there were some boys there that were obviously being bullies.  While this stuff doesn’t bother me, the younger son has always been extremely emotive, and I didn’t want to bring on any additional bullying when he wasn’t able to emotionally handle it.  Putting him in a bad situation is asking for a meltdown, which would make the bullying worse.  Painting toenails was okay because I didn’t think too many people at his gymnastics class would freak out.  Painting fingernails would have been visible at school, and I’m sure a lot of emotional trauma would have ensued, and, probably worse, I don’t know that the teachers would have done anything to prevent it given the problems we were already seeing.

At his new school, he has requested to wear a bracelet to school.  He happens to love animals, and this one had cats.  I was okay with it, but I was fairly sure the dress code at the school doesn’t allow jewelry, so I said to ask the teacher.  The teacher said he shouldn’t wear it, but I don’t honestly know if it’s because it’s a ‘girl’ thing or the dress code.  However, given I’d already said the dress code was likely to forbid it, at least he’ll feel like it’s a rule for everyone and not that he’s being singled out as a boy who wants to wear jewelry.  I don’t get the feeling that they would let other kids pick on him if he chose to wear nail polish or something at this school, as well, so I would probably let him do it there if he asked.  (Although this would require another good look at the dress code, first.)

He also, very shortly after the Dora obsession, started making the connection between girls and pink.  For a while, this turned into, “I don’t want to have anything to do with pink because I’m a boy and pink is a girl’s color.”  After all the stuff before, I somewhat feel like this was my fault.  He used to love pink, but now it’s a girl’s color, and I go back and forth wondering if I caused it because of all the Dora stuff.

He took the ‘pink is a girl’s color’ to mean that all girls must like pink.  Just a couple weeks ago, he was asking me what color to make a character on a Lego website, apologizing that pink was not an option.  I told him that I didn’t like pink all that much.  He seemed surprised when I told him my favorite colors are actually purple and blue.  (Growing up, my favorite color was always blue, and I never really got any shrek for it.  It makes me very mad that society puts this double standard on boys and girls.)

We have a set of multicolored plastic plates that we sometimes use for lunch, and at some point, the younger boy started to refuse any food that was on the pink one.  The older boy tried to set a good example in these situations.

I’ll take the pink plate because it doesn’t threaten my masculinity.

I doubt the younger boy understood exactly what he meant, but he got the gist of it: it’s okay for boys to eat off pink plates.  Still, it’s taken a while for him to come to terms with this.  I have been intentionally giving him the pink plate, but it was only last week when he finally took it.  At first, I thought he didn’t notice, but as he finished up his lunch, he said that he’s okay with using the pink plate now.

This has actually been a very difficult thing to deal with.  My younger boy seems far more aware of what people think than the older one was, but at the same time, he’s obviously interested in things intended for a female audience.  He likes pretty things, and he really loves animals.  Trying to find stuff on cats and dogs for boys is tough: most of the age appropriate animal-related stuff that isn’t covered in garish pink is about sharks and dinosaurs.  This is the same kid who has talked about wanting to be a vet and will get very upset at me if I go to the pet store without him because he HAS to see the kitties up for adoption.  But liking cats and dogs doesn’t seem to be gender neutral in our society.  This is completely ridiculous.

As a parent, I find this hard to navigate.  I don’t think it should matter if he likes pink things, and I don’t want anyone making him feel bad for his interests.  I’ve had to deal with enough of that myself (A girl who likes physics and math and engineering?!) that I don’t want him to have to deal with it.  On the other hand, I don’t want him to walk into a situation where someone might make fun of him and not be prepared to deal with it.  I guess, because of that, I have been erring on the side of caution when making these decisions…but also fear that even those decisions may be giving him the message that there are girl things and boy things, and that it’s not okay for him to like girl things.  I’m not sure how to avoid both problems simultaneously, so for now, I try to look at which is the bigger problem for each individual situation.

Outnumbered January 5, 2012

Posted by mareserinitatis in gifted, math, teaching, younger son.
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Today I’m going to be working with the elementary students again.  This will be interesting as I completely switched gears from what we were doing before.  The stuff we were doing before was fun, but as we move through the book, it looks like they need a lot of multiplication and division…which most second graders don’t have.

Today, we’re going to learn about other number systems.  In particular, I’m going to have them pick a number using Indo-Arabic numerals and ‘translate’ into other numbering systems – Egyptian, Roman, Babylonian, Mayan, and Chinese.  This will give us an opportunity to talk about different bases, positional numbers (i.e. the concept of place value), and how many systems don’t have a zero.  (Although, there’s debate in some cases.)

After doing the prep, I’m SO glad that we don’t use the Babylonian system.  Base 60?!  No wonder my math professor got annoyed when we used degrees.

Thanks to the MacTutor History of Mathematics Archive for the picture!

Wordless Wednesday December 28, 2011

Posted by mareserinitatis in family, Fargo, food/cooking, pets, photography, younger son.
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Wordless Wednesday December 21, 2011

Posted by mareserinitatis in family, food/cooking, math, older son, personal, pets, photography, religion, younger son.
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